Improvement in the mainspring-barrels of watches



H. B. JAMES. MAINSIPRING BARREL FOR WATCHES.

n lllllllllHlH t! I barrel.

f The second part of myinveution relates to the combination of the stop0 connected with the main wheel,

fittin @atrnt amt.

iHENnY'B. JA ES, 0F TRE'NTORlNEW JERSEY.

' Letters Patent N0.107,916,datcd'0ctober 4,1810;

IMPROVEMENT IN THE MAINSPRING-BARRELS OF melee-.-

' The, Schedule referred to in these Itettex: Patent and making pm ofand main wheel, put together JUGS. I

Nature and Objects of the I nvcntiou The first part-of my inventionrelates to the combination of the :mainspring-harrcl of watch or othermovements,confined within the main wheel, and securing them together bythe flange a on the former, to spring into the'groove b in. the latter,fig. 1, the obje'ct of this part of my invention being to unite themtogether with the mainspring in the barrel. A is the B is the mainwheel.

and the stop d connected with the barrel, the object of this part of myinvention being to-impart the power. of themainspring to the main wheeland train, upon winding the mainspring, as usuahand to allow the barrelto turn \vithiu thermaiu wheel upon the break age of the mainspring',thereby shieldiu g the wheel andtrain from injury, as shown infig. 2.Ais the-barrel. Bis the main wheel.

' General Descriptt'oh. A, fig. 1, is the barrel.

a, the flange, which is ,fitted into the groove b in the main wheel B.The are sprung into the barrel;

The stop 0 pmjects outward-from the barrel sufli ciently to connect withthe stop 11, projecting vertically from the main wheL-and, upon winding,they connect together and sustain the force :of the main springnpon-the'train, the-barrel being-flee to turn within the wheel, unlesspreferred to bemade friction tight Int-hat case the stops may'not beneeded.

Claims.

I claim my invention 1. The combination of the 'maihspririg-barrel,prmvided with a small holding-flange, and the main wheel, provided with acorresponding recess, constructed sub stantially as and for the purposesspecified.

2. The combination of'th'e stop 0 connected with the main wheel, and thestopd connected witlr the barrel, operating as and for thepurposesspecified.

, HENRY B JAMES.- Witnes'ses ISRAEL HOWELL, BARTON PAGE Ross.

